package com.chensheng.controller;

import com.chensheng.enums.ResultErrorEnum;
import com.chensheng.exception.SellException;
import lombok.extern.slf4j.Slf4j;
import me.chanjar.weixin.common.api.WxConsts;
import me.chanjar.weixin.common.exception.WxErrorException;
import me.chanjar.weixin.mp.api.WxMpService;
import me.chanjar.weixin.mp.bean.result.WxMpOAuth2AccessToken;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import java.net.URLEncoder;

/**
 * @Author:ChenSheng
 * @Description:
 * @Date: Created in 下午 13:30 2018/5/16 0016
 */
@Controller
@Slf4j
@RequestMapping("/wechat")
public class WechatController {

    @Autowired
    private WxMpService wxMpService;

    @GetMapping("/authorize")
    public String authorized(@RequestParam("returnUrl") String returnUrl){
        String url = "http://chensheng.mynatapp.cc/wechat/userInfo";
        String redirectUrl = wxMpService.oauth2buildAuthorizationUrl(url, WxConsts.OAUTH2_SCOPE_BASE, URLEncoder.encode(returnUrl));
        log.info("【微信网页授权】获取code, result={}", redirectUrl);
        return "redirect:" + redirectUrl;
    }

    @GetMapping("/userInfo")
    public String userInfo(@RequestParam("code") String code,
                           @RequestParam("state") String returnUrl){

        WxMpOAuth2AccessToken wxMpOAuth2AccessToken = null;
        try{
            wxMpOAuth2AccessToken = wxMpService.oauth2getAccessToken(code);
        }catch(WxErrorException e){
            log.error("【微信网页授权】Error:{}", ResultErrorEnum.WX_MP_ERROR.getMsg(), e.getError().getErrorMsg());
            throw new SellException(ResultErrorEnum.WX_MP_ERROR);
        }
        String openId = wxMpOAuth2AccessToken.getOpenId();

        log.info("【微信网页授权】userinfo....., code={}, state={}", code, returnUrl);
        return "redirect:" + returnUrl + "?openid=" + openId;
    }
}
